Perhaps you should try some spelling variations:
ban hanh » ban hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
vai cua » dai cua, hai cua, lai cua
vi cua » di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky nang xa hoi. ((hieu ve) or (hieu va)) cam duc ban hanh ((vi cua) OR (vai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang xa hoi. ((hieu ve) OR (hieu va)) cam duc ban hanh ((vi cua) OR (vai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang xa hoi. ((hieu ve) or (hieu va)) cam duc ban hanh ((vi cua) OR (vai cua)) te".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang xa hoi. ((hieu ve) or (hieu va)) cam duc ban hanh ((vi cua) OR (vai cua)) te*.